Mariah Carey shared her joy and pain during an interview with Robin Roberts on Tuesday’s “Good Morning America,” where she discussed the passing of Whitney Houston, her husband’s health, Dem Babies, and new music. In honor of American Heart Month, the Jenny spokeswoman debuted a black-and-white PSA to create awareness for heart disease.

After attending Houston’s homegoing service over the weekend, the pop diva had a difficult time speaking about the loss of her friend and collaborator, who she dueted with on the Oscar-winning song “When You Believe.”

“I’m almost incapable of talking about this still,” said Mariah, dressed in black. “It’s very heavy emotionally, especially just looking at that little bit of [footage] of us together, but it was great. And I don’t think people could ever understand our relationship. There was always this supposed rivalry in the beginning and then we did the duet and we became friends and I saw her towards the end and I loved her. We all were inspired by her and we all loved her. May she rest in peace and her legend’s gonna go on forever.”

She also expressed her support for Nick Cannon’s decision to leave his radio show after suffering from kidney trouble. “The best thing I think was the choice that he made to leave the radio and to just focus on [‘America’s Got Talent’] and ‘Up All Night,'” she said. “It was just something that hit us really hard at the top of the year.”

But Roc and Roe’s father is making an effort to improve his health. “Now he is doing better. He’s a young, healthy person and it’s about changing the lifestyle. Again, it’s just a lifestyle choice, just an awareness of what can really happen to you no matter how young or in great shape you are.”

Mariah also revealed that she is working on new music, possibly inspired by recent events. “I’m trying to get this song done next week and I’m gonna see if it happens,” she said. “It just happened and I feel like it’s appropriate for the moment right now.”